{"id":269,"date":"2019-02-07T11:09:59","date_gmt":"2019-02-07T11:09:59","guid":{"rendered":"http:\/\/www.institutviladomat.cat\/blogs\/stem\/?p=269"},"modified":"2019-02-07T11:13:18","modified_gmt":"2019-02-07T11:13:18","slug":"substancies-basiques-o-substancies-acides","status":"publish","type":"post","link":"https:\/\/www.institutviladomat.cat\/blogs\/stem\/2019\/02\/07\/substancies-basiques-o-substancies-acides\/","title":{"rendered":"Subst\u00e0ncies b\u00e0siques o subst\u00e0ncies \u00e0cides? Per qu\u00e8?"},"content":{"rendered":"\n<p>La determinaci\u00f3 del pH en una mostra \u00e9s un proc\u00e9s molt habitual en el laboratori d&#8217;an\u00e0lisi qu\u00edmic per quantificar el grau d\u2019acidesa o alcalinitat de la mateixa. La mesura es pot dur a terme amb indicadors com la fenolftale\u00efna o el paper indicador, o amb un pHmetre. Un altre procediment per determinar la concentraci\u00f3 de protons H+ o ions hidroxi OH- en una dissoluci\u00f3 \u00e9s la valoraci\u00f3 \u00e0cid-base, basada en la reacci\u00f3 de neutralitzaci\u00f3 entre \u00e0cids i bases.<\/p>\n\n\n\n<p>L&#8217;alumnat de 4t determina el pH de diferents productes que utilitzem cada dia i indaga sobre el perqu\u00e8 del car\u00e0cter \u00e0cid o b\u00e0sic d&#8217;aquestes subst\u00e0ncies.<\/p>\n\n\n\n<p>Amb els pHmetre Vernier, paper indicador i fenolftale\u00efna mesuraran i compararan el pH de productes com el iogurt, la cocacola, l&#8217;\u00e0cid ac\u00e8tic, l&#8217;amon\u00edac, &#8230; <\/p>\n\n\n\n<ul class=\"wp-block-gallery columns-3 is-cropped wp-block-gallery-1 is-layout-flex\"><li class=\"blocks-gallery-item\"><figure><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"768\" src=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_085120-1024x768.jpg\" alt=\"\" data-id=\"271\" data-link=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/?attachment_id=271\" class=\"wp-image-271\" srcset=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_085120-1024x768.jpg 1024w, https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_085120-300x225.jpg 300w, https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_085120-768x576.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"768\" src=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_085146-1024x768.jpg\" alt=\"\" data-id=\"272\" data-link=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/?attachment_id=272\" class=\"wp-image-272\" srcset=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_085146-1024x768.jpg 1024w, https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_085146-300x225.jpg 300w, https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_085146-768x576.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"768\" src=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_085209-1024x768.jpg\" alt=\"\" data-id=\"274\" data-link=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/?attachment_id=274\" class=\"wp-image-274\" srcset=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_085209-1024x768.jpg 1024w, https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_085209-300x225.jpg 300w, https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_085209-768x576.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"768\" src=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_085305-1024x768.jpg\" alt=\"\" data-id=\"276\" data-link=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/?attachment_id=276\" class=\"wp-image-276\" srcset=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_085305-1024x768.jpg 1024w, https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_085305-300x225.jpg 300w, https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_085305-768x576.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"768\" src=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_090958-1024x768.jpg\" alt=\"\" data-id=\"277\" data-link=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/?attachment_id=277\" class=\"wp-image-277\" srcset=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_090958-1024x768.jpg 1024w, https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_090958-300x225.jpg 300w, https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_090958-768x576.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"768\" src=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_091044-1024x768.jpg\" alt=\"\" data-id=\"279\" data-link=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/?attachment_id=279\" class=\"wp-image-279\" srcset=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_091044-1024x768.jpg 1024w, https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_091044-300x225.jpg 300w, https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_091044-768x576.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"768\" src=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_091116-1024x768.jpg\" alt=\"\" data-id=\"281\" data-link=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/?attachment_id=281\" class=\"wp-image-281\" srcset=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_091116-1024x768.jpg 1024w, https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_091116-300x225.jpg 300w, https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_091116-768x576.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"768\" src=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_091141-1024x768.jpg\" alt=\"\" data-id=\"283\" data-link=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/?attachment_id=283\" class=\"wp-image-283\" srcset=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_091141-1024x768.jpg 1024w, https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_091141-300x225.jpg 300w, https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_091141-768x576.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"768\" src=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_091413-1024x768.jpg\" alt=\"\" data-id=\"285\" data-link=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/?attachment_id=285\" class=\"wp-image-285\" srcset=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_091413-1024x768.jpg 1024w, https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_091413-300x225.jpg 300w, https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_091413-768x576.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/li><li class=\"blocks-gallery-item\"><figure><img decoding=\"async\" loading=\"lazy\" width=\"1024\" height=\"768\" src=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_091614-1024x768.jpg\" alt=\"\" data-id=\"286\" data-link=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/?attachment_id=286\" class=\"wp-image-286\" srcset=\"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_091614-1024x768.jpg 1024w, https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_091614-300x225.jpg 300w, https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-content\/uploads\/sites\/8\/2019\/02\/IMG_20190207_091614-768x576.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/li><\/ul>\n\n\n\n<p class=\"wp-block-gdm-google-drive-embedder-viewer\"><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>La determinaci\u00f3 del pH en una mostra \u00e9s un proc\u00e9s molt habitual en el laboratori d&#8217;an\u00e0lisi qu\u00edmic per quantificar el<\/p>\n","protected":false},"author":24,"featured_media":280,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[5,3,1],"tags":[],"_links":{"self":[{"href":"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-json\/wp\/v2\/posts\/269"}],"collection":[{"href":"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-json\/wp\/v2\/users\/24"}],"replies":[{"embeddable":true,"href":"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-json\/wp\/v2\/comments?post=269"}],"version-history":[{"count":2,"href":"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-json\/wp\/v2\/posts\/269\/revisions"}],"predecessor-version":[{"id":290,"href":"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-json\/wp\/v2\/posts\/269\/revisions\/290"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-json\/wp\/v2\/media\/280"}],"wp:attachment":[{"href":"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-json\/wp\/v2\/media?parent=269"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-json\/wp\/v2\/categories?post=269"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.institutviladomat.cat\/blogs\/stem\/wp-json\/wp\/v2\/tags?post=269"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}